Will we really be here in ten years time welcoming a new creative team for Galactus story 10,589?

Yes yes we will.

The Fantastic Four recycles the same stuff over and over again.

I would say most Fantastic Four stories revolve around

1. Dr. Doom and Latveria
2. Namor and Atlantis
3. The Inhumans and Attilan
4. Black Panther and Wakanda (it's like they only travel to the same 4 places over and over again)
5. Alternate timelines
6. Franklin's powers
7. Ben's mutations
8. The Frightful Four
9. Skrulls
10. Galactus

And that's about it really. Every writer's run will hit most of these.